This is the replication data for "Interest Group Lobbying and Polarization in the United States: 1998-2016 by Alex Garlick.The replication materials (and code to reproduce it) have been prepared in STATA 15.1. Please see the do files below to replicate the article. To replicate the entire article at once, please access the LAP_Replication_README.do file" If you are only looking to replicate the main analysis tables, you can use "LAP_Replication_2_Tables_2+3.do"Data descriptions:-LAP_Replication_COOHWIUS.dta: This is the main file for analysis containing bill-level lobbying and roll-call vote data from 4 legislative venues.-LAP_Replication_GarlickPlus_30states.dta: Replication data from Garlick (2017) and data from the main analysis on CO/OH/WI.-LAP_Replication_Holyoke_50states.dta: Replication data on interest group registrations from Holyoke (2019)-LAP_Replication_lobbyingexpenditures_US.dta: Data from OpenSecrets on lobbying in Congress and financial expenditures-LAP_Replication_MatchedBills_COOHWI.dta: The matched bills identified by Burgess (2016) with the lobbying and roll-call data from the main analysis.-LAP_Replication_RCVs_US.dta: Roll-call votes in Congress used to calculate the average party difference by chamber for the Appendix.-LAP_Replication_ShorMcCarty_50states.dta: Replication data from Shor McCarty (2015) on ideological estimates of state legislators.